False eyelashes and manufacturing method therefor

ABSTRACT

One aspect of the present invention relates to a method for manufacturing false eyelashes, and the false eyelashes in which an false eyelash part and an attachment part are integrally formed by injection molding, wherein the method comprises the steps of: preparing a mold; preparing a thermoplastic elastomer resin; and injecting the thermoplastic elastomer resin into an injection molding machine on which the mold is mounted so as to perform injection molding. The method for manufacturing the false eyelashes of the present invention has excellent production and economic feasibility, the quality of the manufactured false eyelashes is uniform, and the false eyelashes manufactured by the manufacturing method have excellent shape stability, elasticity, and can be provided in various colors and designs.

TECHNICAL FIELD

The present invention relates to a false eyelash structure and a methodof manufacturing the same, and more particularly, to a false eyelashstructure manufactured through injection molding and a method ofmanufacturing the same.

BACKGROUND ART

Many women use false eyelashes for cosmetic purposes, and usage thereofis gradually increasing. Most false eyelashes are currently manufacturedby artificially binding false eyelashes or through knitting and weaving.In particular, as an artificial binding method, an operation of eyelashextensions is a method of coupling eyelash extensions to tip ends ofactual eyelashes of a user one by one. Thus, the process is timeconsuming and the eyelash extensions, which are thin and small, aredifficult to handle.

Therefore, the present invention has been developed to improve qualityuniformity, processibility, and economic feasibility of conventionaltechniques.

DISCLOSURE Technical Problem

An object of the present invention is to provide a method ofmanufacturing a false eyelash structure providing excellentprocessibility.

Another object of the present invention is to provide a method ofmanufacturing a false eyelash structure providing uniform quality andexcellent economic feasibility.

A further object of the present invention is to provide a false eyelashstructure having excellent shape stability and elasticity.

Yet another object of the present invention is to provide a falseeyelash structure having various colors and designs.

Yet another object of the present invention is to provide a method ofmanufacturing a false eyelash structure, by which a false eyelashstructure having a complex structure can be manufactured through asingle process.

The above and other objects of the present invention will be achieved bythe present invention.

Technical Solution

In accordance with an aspect of the present invention, a method ofmanufacturing a false eyelash structure includes: preparing a mold;preparing a thermoplastic elastomer resin; and performing injectionmolding by introducing the thermoplastic elastomer resin into aninjection molding machine on which the mold is mounted.

The injection molding may be multistage injection molding using at leastone mold and at least one thermoplastic elastomer resin.

The method may be performed by double injection molding, and mayinclude: preparing a first mold; preparing a first thermoplasticelastomer resin; performing primary injection molding by introducing thefirst thermoplastic elastomer resin into an injection molding machine onwhich the first mold is mounted; providing a false eyelash structuremanufactured by the primary injection molding to a second mold; andperforming secondary injection molding by introducing a secondthermoplastic elastomer resin into an injection molding machine on whichthe second mold is mounted.

The first thermoplastic elastomer resin and the second thermoplasticelastomer resin may be the same type of thermoplastic elastomer resin.

The first thermoplastic elastomer resin and the second thermoplasticelastomer resin may have different properties or colors.

In the injection molding, the mold may have a temperature of 0° C. to80° C.

The injection molding machine may include an injection portion, anintermediate portion, and a nozzle; and in the injection molding step,the injection portion may have a temperature of 80° C. to 100° C., theintermediate portion may have a temperature of 150° C. to 250° C., andthe nozzle may have a temperature of 200° C. to 300° C.

The mold may have a pressure of 5 MPa to 40 MPa, and an injectionpressure may range from 30 MPa to 100 MPa.

The injection molding machine may have a screw RPM of 30 RPM to 100 RPM.

The injection molding may have an injection time of 0.5 seconds to 20seconds.

In accordance with another aspect of the present invention, a falseeyelash structure includes: includes an artificial hair part and anattachment part integrally formed through injection molding.

The artificial hair part and the attachment part may include an olefin,styrene, amide, ester, urethane, silicone, or PVC-based thermoplasticelastomer resin, and the thermoplastic elastomer resin may have a glasstransition temperature of 80° C. or less.

The artificial hair part may be formed on one surface of the attachmentpart and may include a plurality of artificial hairs of at least onetype.

The artificial hair part may include at least two types of artificialhairs having different colors or properties.

The artificial hair part may include 3 to 100 artificial hairs, and theartificial hairs may have a length of 0.1 mm to 50 mm and a thickness of0.05 mm to 2 mm.

The attachment part may be linear or curved, and may have a length of 20mm to 50 mm and a thickness of 0.05 mm to 2 mm.

The attachment part may be curved, and may include a first curvedportion and second curved portions or linear portions extending fromopposite ends of the first curved portion.

The first curved portion and the second curved portion may havedifferent curvatures or curvature directions.

The attachment part may be formed of the same type of thermoplasticelastomer resin as that of one type of the artificial hairs constitutingthe artificial hair part.

The attachment part may have a convex-concave pattern formed on at leastone of the one surface and an opposite surface thereof.

Advantageous Effects

The method of manufacturing a false eyelash structure according to thepresent invention provides excellent processibility, economicfeasibility, and uniform quality in manufacture of false eyelashstructures. Further, the false eyelash structures manufactured by themethod have excellent properties in terms of shape stability andelasticity, and can exhibit various colors and designs.

DESCRIPTION OF DRAWINGS

FIGS. 1 (a) to (c) show molds used in a method of manufacturing a falseeyelash structure according to one embodiment of the invention, andFIGS. 1 (d) and (e) are a perspective view and a front view of the moldof FIG. 1( c), respectively;

FIG. 2 is a plan view of a false eyelash structure according to anotherembodiment of the present invention;

FIG. 3 shows an attachment part of a false eyelash structure accordingto one embodiment of the present invention;

FIGS. 4 (a) to (c) show false eyelash structures in which convex-concavepatterns are formed in attachment parts thereof manufactured by themethod according to the embodiment of the invention, and FIG. 4 (d)shows various convex-concave patterns;

FIG. 5 is a picture of false eyelash structures having various shapesmanufactured by the method according to the embodiment of the presentinvention;

FIG. 6 shows a method of manufacturing a false eyelash structureaccording to a further embodiment of the present invention; and

FIGS. 7 (a) to (c) show a false eyelash structure according to anotherembodiment of the present invention.

BEST MODE

Embodiments of the present invention will now be described in moredetail.

False Eyelash Structure

A false eyelash structure of the present invention includes anartificial hair part and an attachment part, and the artificial hairpart and the attachment part are integrally formed by injection moldingand have excellent shape stability and elasticity.

The artificial hair part is formed on one surface of the attachmentpart, and has 3 to 100 artificial hairs. The artificial hairs may have alength from 0.1 mm to 50 mm, preferably from 2 mm to 25 mm. Theartificial hairs may have a thickness from 0.05 mm to 2 mm, preferablyfrom 0.2 mm to 0.9 mm. The artificial hair part may be a combination ofartificial hairs having one or more properties or shapes. By way ofexample, the artificial hairs may be linear or curved, and a pluralityof adjacent artificial hairs may cross each other or may be disposed inzigzag arrangement. The artificial hairs may have a polygonalcross-section, such as a triangular cross-section, a rectangularcross-section, and a pentagonal cross-section, and may have a circularor elliptical cross-section, without being limited thereto. When theartificial hairs have a polygonal cross-section, the artificial hairsmay have a rounded corner. The artificial hairs may have across-sectional area of from 0.002 mm² to 5 mm⁵, preferably from 0.03mm² to 0.8 mm².

FIG. 2 is a plan view of a false eyelash structure according to oneembodiment. Referring to FIG. 2, an attachment 20 is provided to attachartificial eyelashes to the skin of a person, and may be linear as shownin FIG. 2 (a) or may be curved as shown in FIG. 2 (b). The attachmentpart has a length of 20 mm to 50 mm, preferably 30 mm to 40 mm. Theattachment part may have a thickness of 0.05 mm to 2 mm, preferably 0.2mm to 0.9 mm.

Referring to FIGS. 3 (a) and (b), when the attachment part is curved,the attachment part may have a first curved portion 21 and second curvedportions 23 or linear portions 25 extending from opposite ends of thefirst curved portion.

When the attachment part has a first curved portion and second curvedportions as shown in FIG. 3 (a), the first curved portion 21 and each ofthe second curved portions 23 may have different curvatures andcurvature directions.

The artificial hair part and the attachment part may be thermallyprocessed, and may be formed by injection molding using a thermoplasticelastomer (TPE) resin having a flexible and resilient property similarto rubber or resin compositions containing the thermoplastic elastomerresin.

The thermoplastic elastomer resin may be an olefin, styrene, amide,ester, urethane, silicone, or PVC-based thermoplastic elastomer resin.Preferably, the thermoplastic elastomer resin is a styrene orolefin-based thermoplastic elastomer resin.

The styrene-based thermoplastic elastomer resin is an elastic materialmost similar to rubber and has a two-phase structure including a softsegment endowing elasticity and a hard segment endowing strength.Examples of the styrene thermoplastic elastomer resin includepoly(styrene-b-butadiene-b-styrene) (SBS),poly(styrene-b-isoprene-b-styrene) (SIS),poly(styrene-b-ethylene-b-butadiene-b-styrene) (SEBS), andpoly(styrene-b-ethylene-b-propylene-b-styrene) (SEPS).

The olefin-based thermoplastic elastomer resin may be an ethylenepropylene diene monomer (EPDM), which includes a soft segment and a hardsegment of polypropylene. The soft segment shows unique rubberelasticity of the thermoplastic elastomer. During molding, the hardsegment is melted and plasticized to exhibit unique molding properties,and then is cured again to prevent plastic deformation.

In one embodiment, the thermoplastic elastomer resin has a glasstransition temperature Tg of 80° C. or less to increase flexibility ofproducts. More preferably, the thermoplastic elastomer resin has a glasstransition temperature Tg of 50° C. to 60° C.

The artificial hair part and the attachment part may further includeadditives, such as pigments, fillers, heat stabilizers, and the like.

In a post-process after injection molding, the false eyelash structuremay be subjected to surface treatment using a coating agent and afinishing agent, such as glittering additives for glittering effects.

In one embodiment of the invention, when injection molding is performedby a single stage, the artificial hair part and the attachment part areintegrally formed with each other. Thus, the artificial hair part andthe attachment part may include the same thermoplastic elastomer resin.

In another embodiment of the invention, when injection molding isperformed by multiple stages, the attachment part may be formed of thesame kind of thermoplastic elastomer resin as that of artificial hairsof one type constituting the artificial hair part. In other words,multistage injection molding is composed of primary injection moldingand secondary injection molding. When the thermoplastic elastomer resinused in primary injection molding is different from the thermoplasticelastomer resin used in secondary injection molding, some of theartificial hairs constituting the artificial hair part can be formed ofthe thermoplastic elastomer resin different from that of the attachmentpart.

During multistage injection molding, the thermoplastic elastomer resinsused in the respective injection molding stages may use pigment to havedifferent colors. Accordingly, the artificial hair part may include aplurality of artificial hairs having different colors, and artificialeyelashes showing various colors can be provided. Moreover, propertiesof the attachment part and the artificial hair part or two types ofartificial hairs constituting the artificial hair part may be partiallyadjusted by applying two or more thermoplastic elastomer resins havingdifferent properties. For example, in multistage injection molding usingthermoplastic elastomer resins having different softness, the attachmentpart may be formed of a flexible soft elastomer and the artificial hairsmay be formed of a relatively strong elastomer, thereby providing aproduct that can be conveniently worn and has firm artificial hairs.

As shown in FIG. 4, in another embodiment of the invention, aconvex-concave pattern 30 is formed on at least one of the one surfaceand an opposite surface of the attachment part. When the false eyelashstructure is attached to skin around the eye, the convex-concave pattern30 imparts flexibility to the attachment part and increases a bondingarea, whereby the false eyelash structure can be easily and naturallyattached to a skin surface. As shown in FIG. 4 (d), the convex-concavepattern may include a concave portion or a convex portion having arectangular, triangular, or circular shape.

Method of Manufacturing False Eyelash Structure

In one embodiment of the invention, the method of manufacturing a falseeyelash structure includes preparing a mold; preparing a thermoplasticelastomer resin; and performing injection molding by introducing thethermoplastic elastomer resin into an injection molding machine on whichthe mold is mounted.

In FIG. 1, (a) to (e) show molds used in the method of manufacturing afalse eyelash structure according to the embodiment of the presentinvention. Referring to FIG. 1, (a) and (b) show molds formingartificial hair parts 11, 13, and (c) shows a mold in which a firstartificial hair part 11 and a second artificial hair part 13 arecombined. A false eyelash structure including the first artificial hairpart 11 and the second artificial hair part 13 having different colorsor properties may be manufactured using a dual-injection moldingmachine. The false eyelash structure may be manufactured through asingle process using a property. In FIG. 1, the mold is a mold accordingto one embodiment of the invention, but the present invention is notlimited thereto. The mold may be manufactured in various forms byreflecting desired designs of artificial eyelashes, that is, shapes ofthe attachment part 20 and the artificial hair part 10.

In injection molding, the mold may have a temperature of 0° C. to 80° C.

The injection molding machine may include an injection portion, anintermediate portion, and a nozzle, and, in injection molding, theinjection portion may have a temperature of 80° C. to 100° C., theintermediate portion may have a temperature of 150° C. to 250° C., andthe nozzle may have a temperature of 200° C. to 300° C.

In injection molding, mold pressure may range from 5 MPa to 40 MPa, backpressure may range from 20 MPa to 80 MPa, and injection pressure mayrange from 30 MPa to 100 MPa.

The injection molding machine may have a screw RPM of 30 RPM to 100 RPm,and an injection time may range from 0.5 seconds to 20 seconds.

According to another embodiment of the invention, the manufacturingmethod corresponds to multistage injection molding using at least onemold and at least one thermoplastic elastomer resin.

In the case of a manufacturing method including a two-stage injectionmolding process, the method may include: preparing a first mold;preparing a first thermoplastic elastomer resin; performing primaryinjection molding by introducing the first thermoplastic elastomer resininto an injection molding machine on which the first mold is mounted;providing a false eyelash structure manufactured by the primaryinjection molding to a second mold; and performing secondary injectionmolding by introducing a second thermoplastic elastomer resin into aninjection molding machine on which the second mold is mounted. Referringto FIG. 1, by way of example, after an artificial eyelash structure isprepared through primary injection molding in a first mold of FIG. 1(a), the manufactured artificial eyelash structure may be provided to asecond mold of FIG. 1 (b) and may be subjected to secondary injectionmolding, thereby providing a finished artificial eyelash structure.

In another embodiment of the invention, a false eyelash structure may bemanufactured using a two-stage injection molding machine or a multistageinjection molding machine while using a single mold in multistageinjection molding. In one example, after the mold of FIG. 1 (c) ismounted on an injection molding machine having a double nozzle, a falseeyelash structure may be manufactured by applying two types ofthermoplastic elastomer resins.

MODE FOR INVENTION

FIG. 5 is a picture of false eyelash structures having various shapesmanufactured through the method according to the present invention. Themethod according to the invention provides excellent processibility,excellent economic efficiency and uniform quality in manufacture offalse eyelash structures, and the false eyelash structures manufacturedby the method have excellent properties in terms of shape stability andelasticity.

FIG. 6 shows a method of manufacturing a false eyelash structureaccording to another embodiment of the present invention. In thisembodiment, two false eyelash structures manufactured by injectionmolding according to the invention may be coupled to each other suchthat an artificial hair part can be realized in various ways.

FIGS. 7( a) to 7(c) show false eyelash structures according to otherembodiments of the present invention. The false eyelash structureshaving artificial hair parts whose shapes are complex can be repeatedlymanufactured through injection molding using the manufactured mold.

It should be understood by those skilled in the art that variousmodifications, variations, and alterations can be made without departingfrom the spirit and scope of the present invention.

1. A method of manufacturing a false eyelash structure, comprising:preparing a mold; preparing a thermoplastic elastomer resin; andperforming injection molding by introducing the thermoplastic elastomerresin into an injection molding machine on which the mold is mounted. 2.The method according to claim 1, wherein the injection molding ismultistage injection molding using at least one mold and at least onethermoplastic elastomer resin.
 3. The method according to claim 2,wherein the method involves two-stage injection molding, and the methodcomprises: preparing a first mold; preparing a first thermoplasticelastomer resin; performing primary injection molding by introducing thefirst thermoplastic elastomer resin into an injection molding machine onwhich the first mold is mounted; providing a false eyelash structuremanufactured by the primary injection molding to a second mold; andperforming secondary injection molding by introducing a secondthermoplastic elastomer resin into an injection molding machine on whichthe second mold is mounted.
 4. The method according to claim 3, whereinthe first thermoplastic elastomer resin and the second thermoplasticelastomer resin are the same type of thermoplastic elastomer resin. 5.The method according to claim 3, wherein the first thermoplasticelastomer resin and the second thermoplastic elastomer resin havedifferent properties or colors.
 6. The method according to claim 1,wherein, in the injection molding, the mold has a temperature from 0° C.to 80° C.
 7. The method according to claim 1, wherein the injectionmolding machine comprises an injection portion, an intermediate portion,and a nozzle, and, in the injection molding, the injection portion has atemperature of 80° C. to 100° C., the intermediate portion has atemperature of 150° C. to 250° C., and the nozzle has a temperature of200° C. to 300° C.
 8. The method according to claim 1, wherein the moldhas a pressure of 5 MPa to 40 MPa, and an injection pressure ranges from30 MPa to 100 MPa.
 9. The method according to claim 1, wherein theinjection molding machine has a screw RPM of 30 RPM to 100 RPM.
 10. Themethod according to claim 1, wherein the injection molding has aninjection time of 0.5 seconds to 20 seconds.
 11. A false eyelashstructure comprising: an artificial hair part and an attachment partintegrally formed through injection molding.
 12. The false eyelashstructure according to claim 11, wherein the artificial hair part andthe attachment part comprise an olefin, styrene, amide, ester, urethane,silicone, or PVC-based thermoplastic elastomer resin, the thermoplasticelastomer resin having a glass transition temperature of 80° C. or less.13. The false eyelash structure according to claim 11, wherein theartificial hair part is formed on one surface of the attachment part andcomprises a plurality of artificial hairs of at least one type.
 14. Thefalse eyelash structure according to claim 12, wherein the artificialhair part comprises at least two types of artificial hairs havingdifferent colors or properties.
 15. The false eyelash structureaccording to claim 12, wherein the artificial hair part comprises 3 to100 artificial hairs, the artificial hairs having a length of 0.1 mm to50 mm and a thickness of 0.05 mm to 2 mm.
 16. The false eyelashstructure according to claim 11, wherein the attachment part is linearor curved, and has a length of 20 mm to 50 mm and a thickness of 0.05 mmto 2 mm.
 17. The false eyelash structure according to claim 16, whereinthe attachment part is curved, and comprises a first curved portion andsecond curved portions or linear portions extending from opposite endsof the first curved portion.
 18. The false eyelash structure accordingto claim 17, wherein the first curved portion and the second curvedportion have different curvatures or curvature directions.
 19. The falseeyelash structure according to claim 13, wherein the attachment part isformed of the same type of thermoplastic elastomer resin as that of onetype of the artificial hairs constituting the artificial hair part. 20.The false eyelash structure according to claim 13, wherein theattachment part has a convex-concave pattern formed on at least one ofthe one surface and an opposite surface thereof.